@article{fdi:010084284,
  title = {{E}nhanced abyssal mixing in the {E}quatorial {P}acific associated with non-traditional effects},
  author = {{D}elorme, {B}. {L}. and {T}homas, {L}. {N}. and {M}archesiello, {P}atrick and {G}ula, {J}. and {R}oullet, {G}. and {M}olemaker, {M}. {J}.},
  editor = {},
  language = {{ENG}},
  abstract = {{R}ecent theoretical work has shown that, when the so-called nontraditional effects are taken into account, the reflection of equatorially trapped waves ({ETW}s) off the seafloor generates strong vertical shear that results in bottom-intensified mixing at the inertial latitude of the {ETW} via a mechanism of critical reflection. {I}t has been estimated that this process could play an important role in driving diapycnal upwelling in the abyssal meridional overturning circulation ({AMOC}). {H}owever, these results were derived under an idealized configuration with a monochromatic {ETW} propagating through a flat ocean at rest. {T}o test the theory in a flow that is more representative of the ocean, we contrast a set of realistic numerical simulations of the eastern equatorial {P}acific run using either the hydrostatic or quasi-hydrostatic approximation, the latter of which accounts for nontraditional effects. {T}he simulations are nested into a {P}acific-wide hydrostatic parent solution forced with climatological data and realistic bathymetry, resulting in an{ETW}field and a deep circulation consistent with observations. {U}sing these simulations, we observe enhanced abyssal mixing in the quasi-hydrostatic run, even over smooth topography, that is absent in the hydrostatic run. {T}he mixing is associated with inertial shear that has spatiotemporal properties consistent with the critical reflection mechanism. {T}he enhanced mixing results in a weakening of the abyssal stratification and drives diapycnal upwelling in our simulation, in agreement with the predictions from the idealized simulations. {T}he diapycnal upwelling is {O}(10) {S}v (1 {S}v equivalent to 10(6) m(3) s(-1)) and thus could play an important role in closing the {AMOC}.},
  keywords = {{T}ropics ; {A}byssal circulation ; {D}iapycnal mixing ; {W}aves ; oceanic ; {PACIFIQUE} ; {ZONE} {EQUATORIALE}},
  booktitle = {},
  journal = {{J}ournal of {P}hysical {O}ceanography},
  volume = {51},
  numero = {6},
  pages = {1892--1914},
  ISSN = {0022-3670},
  year = {2021},
  DOI = {10.1175/jpo-d-20-0238.1},
  URL = {https://www.documentation.ird.fr/hor/fdi:010084284},
}